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148
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Results:
1 - 24 of
508
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Simulation of the carbon cycle in the ocean
A dual carbon-nitrogen biological model of the upper ocean has been developed, which has successfully allowed predictions of fluxes of carbon between atmosphere and the deep ocean to made. Regarding studying the carbon cycle in the ocean, the modelling has highlighted the need for a good understanding of the interactions between the carbon and nitrogen cycles, and also the importance of zooplankton grazing and levels of overwintering biological stocks. Problems have been encountered with the accuracy of prediction of the partial pressure of carbon dioxide in the surface ocean, and the sensitivity of the model to zooplankton parameters, and those parameters which effect overwintering stocks (e.g. mortality parameters). The model has recently been incorporated into a physical General Circulation Model of the Atlantic Ocean. Future work will involve assessing the performance of the biological model in General Circulation Models, and making necessary refinements in order to improve its predictive ability. 1 ref., 1 fig.
Date:
September 16, 1991
Creator:
Fasham, M.J.R.
Object Type:
Report
System:
The UNT Digital Library
An IFE development strategy
The development of inertial fusion as a power source will require achieving four principal milestones: ignition and propagating burn; high gain at low drive energy for the reactor driver; pulse repetition rates of a few Hz; and long-term reliability and economics of a reactor. To keep development time and costs to a minimum, these should be accomplished with as few major facilities as possible. A viable scenario for the Inertial Fusion Energy (IFE) Program would include establishing the first milestone in a Nova Upgrade for ignition and gain and the latter three in an upgradable, low-power Engineering Test Facility (ETF)/Demonstration Power Plant (DPP), i.e. two major facilities. To be successful in as short a time as possible operations at the major facilities would have to be supported by off-line reactor driver and other reactor technology development efforts. These efforts would evaluate and prioritize the myriad of options available at present for power plant and subsystem concepts. This paper describes the elements of such a program that could make the first commercial power available in the decade of the 2020s and estimates the resources needed. This program would be carried out in phases with major go/no-go decision points before each large …
Date:
July 16, 1991
Creator:
Hogan, W.J.; Storm, E. & Lindl, J.D.
Object Type:
Article
System:
The UNT Digital Library
Budgets and behaviors of uranium and thorium series isotopes in the Santa Monica Basin off the California Coast
Samples from three time-series sediment traps deployed in the Santa Monica Basin off the California coast were analyzed to study the flux and scavenging of uranium and thorium series isotopes. Variations of uranium and thorium series isotopes fluxes in the water column were obtained by integrating these time-series deployment results. Mass and radionuclide fluxes measured from bottom sediment traps compare favorably with fluxed determined from sediment core data. This agreement suggests that the near-bottom sediment traps are capable of collecting settling particles representative of the surface sediment. The phase distributions of {sup 234}Th in the water column were calculated by an inverse method using sediment trap data, which help to study the variations of {sup 234}Th scavenging in the water column. Scavenging and radioactive decay of {sup 234}Th are the two principal processes for balancing {sup 234}Th budget in the water column. The residence times of dissolved and particulate {sup 234}Th were determined by a {sup 234}Th scavenging model.
Date:
December 16, 1991
Creator:
Yu, Lei.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0110.0196]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Oklahoma Taxpayers Union President Dan Brown thanks supporters Tuesday night during a watch party in north Oklahoma City."
Date:
October 16, 1991
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Faculty Recital: 1991-11-16 - David Sundquist, tenor
Access:
Use of this item is restricted to the UNT Community
Faculty recital performed at the UNT College of Music Concert Hall.
Date:
November 16, 1991
Creator:
Sundquist, David
Object Type:
Sound
System:
The UNT Digital Library
[Photograph 2012.201.B0110.0186]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Dan Brown Oklahoma Taxpayers Union."
Date:
October 16, 1991
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0548]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "One of four builders in Warwick V, Merlin Compton, right, goes over working plans with an assistant, Gerry Kinnamon."
Date:
August 16, 1991
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0174.0008]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Only a statue remains to remind Edmond residents of Patrick Henry Sherrill's brutal rampage in 1986."
Date:
August 16, 1991
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0731]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The Rev. Dr. Leodis Strong, right, pastor of the Avery Chapel AME Church, was mistakenly identified in Tuesday's editions of the Oklahoma as rape suspect Willie Coakley III."
Date:
December 16, 1991
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0364]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Robin Wilson studies the basis of her chosen career - land."
Date:
July 16, 1991
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0323.0081]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Keith Kauffman (20) and Danny Thomas take turn 4 side by side during Sunday's World of Outlaws action at State Fair Speedway."
Date:
June 16, 1991
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0316B.0360]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Northwest Classen High School student Tracy A. Smith actually the Oklahoma staff writer Stacy D, Johnson stands in the schools foyer while fellow students leave the building after school."
Date:
September 16, 1991
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Baryon inhomogeneity from the cosmic quark-hadron phase transition
We discuss the generation of inhomogeneity in the baryon-number density during the cosmic quark-hadron phase transition. We use a simple model with thin-wall phase boundaries and ideal-gas equations of state. The nucleation of the phase transition introduces a new distance scale into the universe which will be the scale of the generated inhomogeneity. We review the estimate of this scale. During the transition baryon number is likely to collect onto a layer at the phase boundary. These layers may in the end be deposited as small regions of very high baryon density. 21 refs., 1 fig.
Date:
July 16, 1991
Creator:
Kurki-Suonio, H.
Object Type:
Article
System:
The UNT Digital Library
[Letter from Herbert Holl to William McCarter and Jack Davis, May 16, 1991]
Photocopy of a letter from Herbert Holl, executive director of the Greater Denton Arts Council to William McCarter and Jack Davis, co-directors of North Texas Institute for Educators on the Visual Arts. The letter is in regards to the Arts council awarding the institute a $1000.00 dollars. They must sign the agreement contract and a evaluation form is due by January 31, 1992. Included with the letter is the terms and conditions contract.
Date:
May 16, 1991
Creator:
Holl, Herbert
Object Type:
Letter
System:
The UNT Digital Library
Soft x-ray measurement of internal tearing mode structure in a reversed-field pinch
The structure of internally resonant tearing modes has been studied in the Madison Symmetric Torus reversed-field pinch with a soft x-ray detector system consisting of an imaging array at one toroidal location and several detectors at different toroidal locations. The toroidal mode numbers of m = 1 structures are in the range n = {minus}5, {minus}6, {minus}7. The modes propagate with phase velocity v = 1--6 {times} 10{sup 6} cm/s, larger than the diamagnetic drift velocity v{sub d} {approximately} 5 {times} 10{sup 5} cm/s. Phase locking between modes with different n in manifested as a beating of soft x-ray signals which is found to be strongest near the resonant surfaces of the modes (r/a = 0.1 -- 0.5). 15 refs., 5 figs.
Date:
September 16, 1991
Creator:
Chartas, G. & Hokin, S.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0264.0147]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Six Gun Sage, with Jacky Marin up, wins the Remington park Quarter Horse Futurity on Saturday."
Date:
June 16, 1991
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0228.0300]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Oklahoma City shortstop Gary Green hurdles over Louisville's Joey Fernandez to complete a double play in the second inning Tuesday night at All Sports Stadium."
Date:
July 16, 1991
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0249.0913]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "BATTLE BANNER - U. S. Marine Cpl. Gerald Harper , joined by fourth -and fifth-graders from Ryan ..."
Date:
April 16, 1991
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0163B.0033]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Painters are using scaffolding and an extension boom to enhance the ceiling at the state Capitol."
Date:
October 16, 1991
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0260.0395]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Rapid construction progress on the John Kilpatrick Turnpike is evident from a vantage point at Bryant Avenue, looking east."
Date:
April 16, 1991
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0347.0043]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sergey A. Koshker, a Soviet businessman and member of the country 's reformist political party, is seeking asylum with his wife in Oklahoma."
Date:
August 16, 1991
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0151.0524]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Alice Dahlgren , Re/Max Nichols Hills , recently was inducted into the Executive Club of Re/ Max International .."
Date:
February 16, 1991
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0162]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Steve Daniels of Edmond North charges past Edmond Central's Darrin Hacker during freshman boys basketball action."
Date:
December 16, 1991
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0730]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
December 16, 1991
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History